[TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 - Vertical Collapse

Quality Control
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message ----- 
From: "Kevin" <kevintv@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, November 30, 2004 3:00 PM
Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 - Vertical 
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> What does QC stand for?
>
> Kevin Wilks
> Kevin's TV & Video Repair
> Penticton BC Canada
> kevintv@xxxxxxx
>
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of J Silverman
> Sent: Monday, November 29, 2004 3:38 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 - Vertical
> Collapse
>
> QC people know that bad parts in a sample mean bad parts in the batch,
> and
> if the number of bad parts is above normal that something is wrong with
> the
> whole  batch and they will probably all cause trouble eventually. QC
> people
> also know that you cant test quality into a part, so sorting out the bad
> parts doesnt mean that the rest will stay good. Savvy users of
> electronic
> components usually want to have a look at the manufacturers QC data and
> test
> results before the batch is shipped. They dont want batches that had a
> higher than normal reject rate in the original testing.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> Fax/Phone 864 232 3889
> mail to: greentron@xxxxxxx
> ----- Original Message -----
> From: "Kevin" <kevintv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, November 29, 2004 3:55 PM
> Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 - Vertical
> Collapse
>
>
>> If one in a batch is bad, does that mean that the whole batch is bad?
> I
>> am guessing that they make a certain number all at the same time.
>>
>> Kevin Wilks
>> Kevin's TV & Video Repair
>> Penticton BC Canada
>> kevintv@xxxxxxx
>>
>>
>> -----Original Message-----
>> From: techassist-bounce@xxxxxxxxxxxxx
>> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Myers
>> Sent: Monday, November 29, 2004 6:47 AM
>> To: techassist@xxxxxxxxxxxxx
>> Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 - Vertical
>> Collapse
>>
>> Large enough to test a sample instead of the entire batch and small
>> enough to not to cause the factory to sink.
>>
> ************************************************************************
>> *******************************************
>> Since 1972
>> Jim Myers
>> Telrad Electronics
>> Fort Wayne, Indiana
>>
>> Kevin wrote:
>> > How large were the batches?
>> >
>> > Kevin Wilks
>> > Kevin's TV & Video Repair
>> > Penticton BC Canada
>> > kevintv@xxxxxxx
>> >
>> >
>> > -----Original Message-----
>> > From: techassist-bounce@xxxxxxxxxxxxx
>> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Myers
>> > Sent: Saturday, November 27, 2004 7:26 AM
>> > To: techassist@xxxxxxxxxxxxx
>> > Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 -
> Vertical
>> > Collapse
>> >
>> > I'm no xpert fer sure but in my opinion any semiconductor purchased
>> from
>> >
>> > a manufacturer should be an ok part since all the manufacturers have
>> > safeguards in place to insure that the parts they purchase meet the
>> > required specs. Way back when Magnavox was Magnavox I worked there
> and
>> I
>> >
>> > know they had an entire department set up to inspect and test
> incoming
>>
>> > parts by testing a sample of every batch, if the sample failed the
>> > entire batch was rejected and returned to the supplier. Guess where
>> the
>> > cheap generics come from!
>> >
>>
> ************************************************************************
>> > *******************************************
>> > Since 1972
>> > Jim Myers
>> > Telrad Electronics
>> > Fort Wayne, Indiana
>> >
>> >
>> > Kevin wrote:
>> >
>> >>I have never had a problem with generic vertical IC's.  If I do have
> a
>> >>problem, do I have to buy them from each manufacturer, or can I get
>> >
>> > them
>> >
>> >>from one manufacturer that would be good for all TV's?
>> >>
>> >>Kevin Wilks
>> >>Kevin's TV & Video Repair
>> >>Penticton BC Canada
>> >>kevintv@xxxxxxx
>> >>
>> >>
>> >>-----Original Message-----
>> >>From: techassist-bounce@xxxxxxxxxxxxx
>> >>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Myers
>> >>Sent: Friday, November 26, 2004 1:27 PM
>> >>To: techassist@xxxxxxxxxxxxx
>> >>Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 -
> Vertical
>> >>Collapse
>> >>
>> >> From the manufacturers since we had problems with generics.
>> >>
>> >
>> >
>>
> ************************************************************************
>> >
>> >>*******************************************
>> >>Since 1972
>> >>Jim Myers
>> >>Telrad Electronics
>> >>Fort Wayne, Indiana
>> >>
>> >>
>> >>Kevin wrote:
>> >>
>> >>
>> >>>Jim, where do you buy your vertical deflection IC's?
>> >>>
>> >>>Kevin Wilks
>> >>>Kevin's TV & Video Repair
>> >>>Penticton BC Canada
>> >>>kevintv@xxxxxxx
>> >>>
>> >>>
>> >>>-----Original Message-----
>> >>>From: techassist-bounce@xxxxxxxxxxxxx
>> >>>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Myers
>> >>>Sent: Friday, November 26, 2004 10:03 AM
>> >>>To: techassist@xxxxxxxxxxxxx
>> >>>Subject: [TechAssist] Re: Quasar TV - QC298X50H - YAEDC218 -
> Vertical
>> >>>Collapse
>> >>>
>> >>>Generic LA7838? Shame, shame, shame!
>> >>>
>> >>
>> >>
>> >
>>
> ************************************************************************
>> >
>> >>>*******************************************
>> >>>Since 1972
>> >>>Jim Myers
>> >>>Telrad Electronics
>> >>>Fort Wayne, Indiana
>> >>>
>> >>>
>> >>>David wrote:
>> >>>
>> >>>
>> >>>
>> >>>>Hello All,
>> >>>>
>> >>>>Replace LA7838 deflection IC along with caps C455 (100uf/25v) and
>> >
>> > C453
>> >
>> >>>>(2.2uf/100v), TV was OK when I left. Customer called backed today,
>> >>>>picture started developing lines on top of screen, slight
>> compression
>> >>>
>> >>>of
>> >>>
>> >>>
>> >>>
>> >>>>picture, think he mentioned black on top. What caps did I miss?
>> >>>>
>> >>>>Thanks in advance,
>> >>>>
>> >>>>David Lessard
>> >>>>Alexandria Electronics
>> >>>>mr_fixit@xxxxxxxxxxxx
>> >>>>
>> >>>>
>> >>>>
>> >>>
>> >>>
>> >
>>
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